(the list archive is down right now, so pardon me if this has been covered before.)
In pd/src/makefile.in and pd/extra/*/makefile, there are an number of lines that literally call 'cc' rather than use the $(CC) var. This means that you can't compile Pd using CC=gcc-3.2, for example, which is needed for Debian/sid(unstable) or any other system that uses gcc-3.3 as its cc. (you can change the symlink, but that can break other dependencies).
Attached are "diff -uw" files for the relevant changes.
.hc
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Man has survived hitherto because he was too ignorant to know how to realize his wishes. Now that he can realize them, he must either change them, or perish. -William Carlos Williams